Some researchers have conjectured that stem-pitting disease in peach tree seedlings might becontrolled with weed and soil treatment. An experiment was conducted to compare peach treeseedling growth with soil and weeds treated with one of two herbicides. In a field containing 20seedlings, 10 were randomly selected from throughout the field and assigned to receive HerbicideA. The remaining 10 seedlings were to receive Herbicide B. Soil and weeds for each seedling weretreated with the appropriate herbicide and at the end of the study period the height (incentimeters) was recorded for each seedling. A box plot of each data set showed no indication ofnon-Normality. The following results were obtained:(cm)s (cm)Herbicide AHerbicide B94.5109.110A 95% confidence interval for uB - HA is given by which of the following expressions? (Use theconservative value for degrees of freedom.)102 9?(109.1- 94.5) t 1.96.102 92(109.1- 94.5) + 2.262.910(109.1- 94.5) + 1.96,10V 10102(109.1- 94.5) ± 2.262,V 10 1010 92(109.1- 94.5) +1010

x1 = 109.1 x2 = 94.5 s1 = 9 s2 = 10 n1 = 10 n2 = 10

A 95% confidence interval for ug - HA is given by which of the following expressions? (Us conservative value for degrees of freedom.) 10 92 (109.1- 94.5) ± 1.96, 10 92 (109.1-94.5) + 2.262, 10 92 (109.1- 94.5) ± 1.96. 10 10

A 95% confidence interval for ug - HA is given by which of the following expressions? (Us conservative value for degrees of freedom.) 10 92 (109.1- 94.5) ± 1.96, 10 92 (109.1-94.5) + 2.262, 10 92 (109.1- 94.5) ± 1.96. 10 10

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

Some researchers have conjectured that stem-pitting disease in peach tree seedlings might be
controlled with weed and soil treatment. An experiment was conducted to compare peach tree
seedling growth with soil and weeds treated with one of two herbicides. In a field containing 20
seedlings, 10 were randomly selected from throughout the field and assigned to receive Herbicide
A. The remaining 10 seedlings were to receive Herbicide B. Soil and weeds for each seedling were
treated with the appropriate herbicide and at the end of the study period the height (in
centimeters) was recorded for each seedling. A box plot of each data set showed no indication of
non-Normality. The following results were obtained:
(cm)
s (cm)
Herbicide A
Herbicide B
94.5
109.1
10
A 95% confidence interval for uB - HA is given by which of the following expressions? (Use the
conservative value for degrees of freedom.)
102 9?
(109.1- 94.5) t 1.96.
102 92
(109.1- 94.5) + 2.262.
9
10
(109.1- 94.5) + 1.96,
10
V 10
102
(109.1- 94.5) ± 2.262,
V 10 10
10 92
(109.1- 94.5) +
10
10

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